Aero Lastic Sealant

Aero Lastic Sealant

Concrete Joint Bitumenised Thermoplastic Compound


This sealing compound was developed to provide strongest adhesion and flexibility when used in joints of concrete, flexible surfaces, walls, bricks, stone and glass. There are many such materials in use like Rubberized Bitumen, Siliconised Rubbers, Acrylics, Urethane and Sulphate etc.; however Aerolastic Compound gives far better results than other such products.

The rubber based Bitumen is good only if not heated because once rubber is treated with heat in presence of Bitumen it becomes very hard and flexibility is reduced to half; thus reducing its life. Similarly other products mentioned above including epoxy resins are very expensive to use.

This product which is made with selected Bitumen and Thermoplastics is best due to the reason that if heated man times it will come back to same flexibility and adhesion on cooling. Moreover, price is low and its ability to heat more than once has edge and advantage over similar products in use.


ASTM – D3405, D3406, D3407/78 or ASTM – C920/98


Only dark black.


Aerolastic Compound has the ability to extend and recover many times without losing bond; because of its resistance to heat and water the sealant is extensively used to provide fully water-tight seals in horizontal joints subjected to high degree of movements.

It is recommended for horizontal joints in road cracks, flexible surface joint, concrete, bricks steel, pavement, factories, roofs, ship decks, and between pre-cast concrete panels, dams, reservoirs, culverts, water treatment plants, high rise buildings, bridges, curtain walls, and around services pipes and sewerage.

Preparation of Surface

The sides of the joints and the joint itself where adhesion is critical must be dry, free from dirt, dust,

cement laitance and any loose materials for the correct performance of the sealant The joints should be thoroughly cleaned with wire brushing and then blown clean with compressed air. Apply Concrete Joint Primer with ordinary brush on the joint faces at least 2 to 4 hours before pouring in hot sealant.


Under normal conditions if dust and dirt is not there it can be poured directly into the joints. If it is an old joint or some material was previously used; for good adhesion make sure to remove all such materials before application of primer. Apply with brush concrete joint primer at least 2 to 4 hours before pouring in hot sealant.

Method of Application

Heat the container to 140°C to 150°C until the entire compound becomes liquid. Pour the liquid between the prepared joints slightly above the joint. Apply prime to concrete joint before pouring in hot material. For horizontal joints heat the material till it become paste and apply to joints using metal knife.

Movement Accommodation

It will provide satisfactory results in joints subject to regular movements or permanent deformation within 33% to 50% of the original joint width. For horizontal joints movement accommodation designed to minimum of 12 mm and to maximum of 25 mm. The width and depth ratio should be as in the table below:


All Size in mm

Width Depth
12 12
20 20
25 20
30 20
40 25

Maintaining Correct Joint Width

Compressed fiber filler boards impregnated in bitumen or cork sheet boards or poly propylene rods or thermopore sheets be inserted inside the expansion joint up to the required depth and bond breaking polyethylene tape should be inserted on top of boards to prevent the sealant to adhere with the filler board. This will ensure flexibility of the sealant. See Fig.1

Some times polypropylene support strip are used. Then correct the depth as in Fig. 2 before pouring in joint sealant.

Estimated Guide

Chemical Resistance

Aerolastic Compound has excellent resistance to oils, most of the chemicals, water, emulsions etc. Petroleum based oils if stand for longer periods will effect its qualities. However, drippings for short periods are ineffective.

Storage and Shelf Life

Aerolastic Compound can be stored anywhere and it has very long storage life. The only need is to heat the sealant at specified temperature before use.


  • 4 kgs, 20 kgs and 215 kgs packing are available.
  • For 4 kgs pack just heat the tin directly until the sealant liquefies.
  • For 20 kgs packing it is required to remove the sealant from the container and heat it in some open pan slowly & steadily.
  • For 215 kgs packing DO NOT heat the drum in standing position rather position it horizontally and cut the drum from center in such a way that it works like an open pan or remove the sealant from the container and heat it in some open pan until it liquefies.